The Olympic Athlete from Russia (OAR) team has declined to name the suspect though it did confirm a "possible violation."

"Today, the headquarters of our delegation received an official notification from the International Olympic Committee about a possible violation of the anti-doping rules," an OAR statement said, according to The Guardian.

"We do not call the name of the athlete or athlete, as well as the sport, prior to the results of the opening of the sample B," the OAR added.

The results of the B sample, a second doping test used to confirm or invalidate the presence of banned substances in the first sample, will be known on Monday.

Russian media has named the alleged doper

Sport Express, a daily sports newspaper in Russia, has said the athlete under investigation is Alexander Krushelnytsky, who helped OAR to a bronze medal in the mixed doubles curling event on February 13.